Mobile elevator



April 14, 1942.

R. LE TOURNEAU MOBILE ELEVATOR Filed June 20, 1941 INVENTR.

'ATTORNEYJ R. G; Le 7qurneau Ap 1942. R. G. LE TOURNEAU- 2,279,832

MOBILE ELEVATOR Filed June 20, 1941 6 Sheets-Sheet 3 INVENTR, E. G. Le7ourncau A TTORNEYS April 14, 1942.

. R. G. LE TOURNEAU 2,279,332 MOBILE ELEVATOR Filed June 20, 1941 6 Shets-Sheet 4 INVENTOR. B. G. Le Tourn 'eaw u ATTORNEYS April 14, 1942. R. G. LE TOURNEAU MOBILE ELEVAOR Filed June 20, 1941 6 Sheets-Sheet 6 v INVENTOR.

G.LeTour eaw ATTORNEY bers l4 form the outermest of three telescopic trame assemblies.

A rectangular but 'elongated fioating trame, shown detached in Figs. 5 and 6, is disposed in guided relation and for vertical movement between channel trame members l4; this fieating trame comprising vertical channel-shaped sides l8 tacing teward each other and fitted with rollers 19 which ride between the flanges et channel members I4 with an easyfit, and other rollers 20, adjacent the lower rollers 19, which ride the bottom et said members [4. The latter at the top are provided with rollers 20a engaging the outer faces et members la. Cross beams 2l connect sides l8 et the floating trame at the front therect. A multiple sheave bleck 22 is disposed adjacent and centrally ahead et the lower end et the fieating trame, being connected to sides l8 .by means et a skeleten cage 23. Theupper or V corresponding multiple sheave block 24 is mount-" ed on the underside et plate Il in vertically alined relation. A cable 25 leads from the drum 5 et power centrolunit 4 onthe tracter, over a direction-changing sheave 26, about anether sheave 21 mounted en post 1, thence back and forth about the sheaves et blocks 22 and 24,

and finally to a dead nd attachment 28 alongside et black 24. g

' An elevator trame et elongated rectangular configuration, but somwhat shorter than the fioating trame, is vertically disposed betweenthe channelsides I8 ot'the floating trame and comprises facing channel sides 29 offset rearwardly a. slight distancerelative te said sides 18, and cennected by top andbottom cross beams 30.

Thesides 29 carry rollers 3l at both ends which 35 with one end et said cablesbeing anchored te plate Il and the other end anchor'ed, aS at 31, to the elevator trame adjacent the lower ends'ot side channls29. Cables36 are etsuch fixed outer trame members 14; the fleating trame, as it rises, providing the necessary firm support for the elevator trame at all positions et the latter. At the same time, an excessive permanent height, which would intertere With movement through warehouse doors and the like, is avoided.

It will be seen that the machine is capable et lifting very heavy loads due to the multiplication et power between the power control unit 4 and elevator trame, and in addition the projecting trame 2 and supperted engiue 3 serve as a ceunter-weight which} prevcnts rearward tipping when a lead is in position en arms 34 and the elevator trame raised. Fer transporting a lead from placete place, the machine is very maneuverable due to the close ceupling et the tracter and elevator assemblies, and this advantage is et importance to facilitate lifting, transpertng, and stacking et loads,

From. the toregoing description it will be readily seen that I have produced such a device as Substantially tulfills the objects et the invention as set forth herein.

While this specification sets forth in detail'the present and preterred construction et the device, Still in practice such deviations from such detail may be reserted to as do not form a departure from the spirit et the invention, as defined by the appended claims.

Having thus 'described my invention, What I claim as new and usetul and desire to secure by Letters Patent is:

lefig'th that When the floating trame and sheaves 35 are in lowermdst position, the elevator trame isin a like position with lead arms 34 enthe greund, as show'n Fig. l.

Opemton Iii use, the tracter assembly is operatedor inaneuvered te position arms 34 beneath the lead te be litted, whereupon power control unit 4 is actuated se as te wind,cable 25 ente drum 5,which reSults in multiplasheave block 23 being drawn upward toward black 24, carryihg the attached fioating trame upWardvrelative to the fixed trame members M. 7 As the floating trame rises, sheaves 35 likewise rise which in turn pull upward en,cables 36, shortening the reaches thereot connected to the elevator trame and elevating the latter from the ground twice thedistance the floating trame moves, as shown in Fig. 2. 7

It will thus be seen that a lead may' be lifted from the ground a height nearly that et the 1. A mobile elevator comprising a fixed upstanding trame, supperting wheels theretor,' a vertical post disposed ahead et said fixed trame, rigid connecting members between the post and the fixed trame'attop and bottom, a pair et tongues projecti'ng torwardly from the post.in vertically spaced relation, a two-whecl tracter including a ,torwardly projecting engine supa porting trame, vertically alined means pivoting said tongues* on the tracter at the rear ter horizontal swinging movement, a power drum on the tracter-between said tongues, a floating trame mounted in telescepc vertically movablerelatien to the fixed trame, an elevator trame mounted in telescepic vertically mevable relation to the floating trame, a multiple sheave bleck and tackleg connected between the fleating trame at the bottom and theuppcrmostone et said connecting members and having a lead cable, a direction changing sheave on the uppermost teng ue abeve said drum, said lead cable passig through said sheave and being attached to the drum, and means to raise the elevator trame by and uDon vertical movement et the floating trame. 4 vA 2. In a mobile elevator which includes the combination et a wheel supperted elevator assembly having rearwardly projecting leadsupporting arms, a tracter ahead et said elevator assenibly and a vertically rigid horizontsily swivelng dratt connectien the'rebetveen; said tracter including means projecting a substantial distance ahead et its supperting wheels .in ceunterbalancing relation to said lead supporting.arms. A t

3. In a mobile elevator which includes the combinaon ofa wheel supperted elevatonassemblyhaving rearwardly prejecting lead sup: pbrting arms, a tracter. ahead et .said elevator 'assembly and a vertically rigid horizontally swiv{gling dratt connecten therebetween;' said traX:ter{being et the'two-whecl type and includ ing a frame portion projecting a substantal distance ahead of the wheel axis in overhanging relation to the ground, and an engine supported on said frame portion in counterbalancing relatien to said 1oad supporting arms.

4. A mobile elevator comprsing a wheel supported cable actuated e1evator assembly, a pair of tongues rigid with and projecting forwardly from the elevator assembly in vertically spaced relation, a tracter ahead of said tongues, means pivoting said tongues on the tracter for hori- 

